Cytological studies on the genus Holcoglossum (Orchidaceae)
Jin, Xiao-Hua; Zhang, Ting; Gu, Zhi-Jian; Li, De-Zhu
AbstractThe karyotypes of ten species of Holcoglossum (Orchidaceae), a highly endangered and diversified genus from China, were investigated to study the infrageneric relationships, biogeography, and speciation patterns in the Hengduan Mountains. The karyotype formulae of the studied species are as follows: 2n = 38 = 20m + 18sm in H. subulifolium, 2n = 38 = 22m + 16sm in H. amesianum, 2n = 38 = 26m + 12sm (6 SAT) in H. lingulatum, 2n = 38 = 26m + 12sm in H. wangii, 2n = 38 = 10m + 28sm in H. kimballianum, 2n = 38 = 14m + 22sm + 2st in H. flavescens, 2n = 38 = 24m + 12sm + 2st in H. rupestre, 2n = 38 = 14m + 20sm + 4st in H. sinicum, 2n = 38 = 16m + 14sm + 8st in H. weixiense, and 2n = 76 in H. tsii. The karyotypes of two tropical species, H. amesianum and H. subulifolium, are the most primitive in the genus, whereas those of four temperate alpine species, H. sinicum, H. rupestre, H. weixiense, and H. flavescens, are more advanced. H. tsii is a tetraploid and H. rupestre may be one of its ancestors. The low frequency of polyploidy in Holcoglossum in the Hengduan Mountains region supports the conclusion that chromosome stasis during rapid speciation is common there. (C) 2007 The Linnean Society of London.
KeywordBiogeography Chromosome Stasis Hengduan Mountains Karyotypes Tetraploid
Subject AreaPlant Sciences
Indexed BySCI
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000247225400012
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Herbarium PE, Inst Bot, Beijing 100093, Peoples R China
Recommended Citation
GB/T 7714
Jin, Xiao-Hua,Zhang, Ting,Gu, Zhi-Jian,et al. Cytological studies on the genus Holcoglossum (Orchidaceae)[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2007,154(2):283-288.
APA Jin, Xiao-Hua,Zhang, Ting,Gu, Zhi-Jian,&Li, De-Zhu.(2007).Cytological studies on the genus Holcoglossum (Orchidaceae).BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,154(2),283-288.
MLA Jin, Xiao-Hua,et al."Cytological studies on the genus Holcoglossum (Orchidaceae)".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 154.2(2007):283-288.
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